like, if your API doesn't provide me a follow_user() call, but the user can follow anyone by clicking one link?
Your lack of a follow_user() call is not going to stop me. I'm just going to click the link, automatically.
Having an API 1.0 doesn't mean API 0 goes away.
And I think this is an under-discussed part of automation because it's associated with spammers and such, but they're only one possible user of this. By making it better known it can get used for more legitimate uses